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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e22dc690a86e1659cdab5533b1a11422d644dc3e99b4c29cd61ee605dfa97234' 
  AND token = 'gwowELSKxHmCvVef0TRGLrFat9XdifXQsSH+G6i+ipg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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