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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fba8e0bbc0958060978572fc472c75b7c3f9aff708501eaeb4699aa8a6a04959' 
  AND token = 'LDwMORXjbbFKWW9BzlhZqOloVcUQt9g1iKHaC52PAVg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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