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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '063fbce58ca4ec6dc423bbb372653d6023b2db6d2e81a0dd9869cdde5788867d' 
  AND token = 'V4C4FZ+daF1masqxb238GiMP4oOMTHYK07ikAgcoBjo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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