Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '43efa53f312a0ab64841db306fe7b18955aa6bb9006708f82eb94fd1b1a2e799' 
  AND token = '7wvfPz2Ff8qMZvN5Gop4veR13XRFeK8ah6GPae94mrc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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