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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'af9e14af7d7044566b188cdbeca0ff971f1fa1330898d32fd36f8ea05b285daa' 
  AND token = 'w9HCiaizwDmGFy3XRtaqWk0fSFY4p7wATJts5fJ0fmI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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