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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '072771e1b73d5794599919a6b13a482213782bf6791caa52bd4c1d5590aa3dcf' 
  AND token = 'Ls82Ziw2Y+nrEbuxTnmTiDHnwDMHUYzWZKKMBpDWYiQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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