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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cbbadbed8371b32cc12dd9f43b099ea8ede9e33f5e2ef073ff05ddf83e0925dc' 
  AND token = 'eNJqUgSN7/NFRUAT76x+KpSplFOsrIbXn6UNhoUkDw8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}