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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9b754579d947f2fdb0b7159cde3e8b5edd1fc1c3b4ab2b83a26cc2de0a049a05' 
  AND token = 'UMW5B0UplANLLNQ1M0U+KsSn7e7BGtIG9Oo5z1hdB40=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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