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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59b37ed5cbd7e32c18002dc43ff961818c8e6789504c1fa514bcadba4d17d72d' 
  AND token = 'apO1ZAMjDOpP4JoNW2STyYrXWY6kmKyB10Zm0bbDpvo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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