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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5265d715ea1f14327438d2d1061004453a005445c58a68d4d69a185d5cfd81cb' 
  AND token = 'kgyV4HKlNYBUuk8QUMOnpduXl0nX5HO0sP/lQ5Zy3II=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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