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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11d0fd32767c19971ca7f3b22911db85b99b1021771135f5a78c00cbf12972d9' 
  AND token = 'qxt3vsJtYtx6606BSXfwW2YNqOp1pob49bRcoGQvTK4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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