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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0e67b4377b5d400ecfcf5b2cd25cb3df0fdf1a533689f538f930efec88f4871d' 
  AND token = 'TisM2gA8Me3h/TBsjMpTNYelXur80h3/8wGFmkCygbk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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