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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'd71bd697c064fa66b228f3b0d273b645a171306006ee98a542f13b7325e2b2de' 
  AND token = 'eppwrHaZSiC7iX2I5dPZj1NMmY8bhI8ZdAjnlYplhUU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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