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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '49f8967b052290ca0fc442b1c5c470dbf36e651c6196464cd22b5a5d2105d34d' 
  AND token = 'bBUoc+exAyzrRvG3Uoh4+Dm3TsAcqFI8nG9EAYYISec=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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