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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3794012a76cbe3263d91baa2c12599b707a878c0ff3a97b6679511daec8c0b49' 
  AND token = 'G9YEpkSDofD/m7M3nTz9HQ/CFgJhj0Fli7cNv2Q836c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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