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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '563e72979f2a7c36c0ff8d3b0d386aa090cc40d117a6130cd4b2e729c37134be' 
  AND token = 'n8od2kyGSQvNsVrXJmmGItFKpLi7Eg1QH7FFqLwokYQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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