Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ae31aa4f9423d068d1563a56ce2d94c87c21756b1f24474638aba35e188a132' 
  AND token = 'cXHkIk4tsv76lwXCYuQzwC4rygCMzohxlbOpBNn5vYQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00094

JSON explain

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