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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9ae1e87b789bc1cdd1f8d5371ba8935d0339e88d5400a4ec2482f900ef11112' 
  AND token = 'vFjANifYJ1Ozz2nc/TT/gzKXqEXyhagYzjkL3xaVfqA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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