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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6ead788d6c83d6b49fe06f8ed11dcd59a54ef2ee72ab26ce6932b9316f568ec3' 
  AND token = 'K0zrvq8pMWalAar/UYjiqyMtuuC/d8QRdDpJ0uGVS4A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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