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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1863a4406ed28c4c90c5420e69c97fcfe1e10a43ab8874b9d30c2da40d49c773' 
  AND token = 'BwkRVHmHE57HazJDeuDin49pNojs+xm49a98D3EUmIw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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