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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '184d368e10f71c5251c746daef996a2072a2ad6246490a767146385de519e6eb' 
  AND token = 'cOi4Zth4CW6A8Ejw6HU7uAmKMKoo4m0DmERPQed3mus=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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