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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77a8c0d262c2eeaaff1152c32e9b9656e85aced568cd421812f6c6d9746ed9e2' 
  AND token = 'fVAvGFwAzugq/zs8k9J30Ezl0Fw2YacoDQeGQSChcA4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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