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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '930604d5c681ab54a05b6099b921f2767ef0a060db0bb1c46434dbddc4892df4' 
  AND token = 'rXav2SoUty7dAyigMsH42Bjksm5xB4AiBYsgs2o6Tik=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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