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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '56223fb06b06940c86d6d1b506f3b85422d99de0d00ae815ee11cc32fc184c71' 
  AND token = 'pI90ID4kg29w4q9SJEu34RAbfZbKm0gOCc2ARZYYGYc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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