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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'd695076c5b4616e1e62e79249c2069e24c552e9be894fd5fa0eb06739bb88a82' 
  AND token = 'xY00xQx3Jk+xARxkcAEtPFBOLSeYyoE4WCIH7Y2BwdQ=' 
  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"
    }
  }
}