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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8e927efd5a65033eababa505270cc0b92735677671a1bb5c38dfc62ce70b26b1' 
  AND token = 'pDUbLD8xIk6X6j99O5XU5cBFBdXbbEK3yz8+1hKJnbM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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