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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '710b9da8f92999e3d22eb799a8fdf095024650a5c4c295491dd753a1e74b186a' 
  AND token = 'TJR6XPEO8NK25ly25zrV1+d16AIBfubGL2MyvgiEssM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}