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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd672673d34905b56546b074fb3ab65fcc5e732d56ccd52e669a13a8bc1515568' 
  AND token = 'mDrDN07oAjXWeXgVQnq9r0O4hC3b6aDH+KeS/a4hTJI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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