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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c1504e10cd42d43d3d2e80ca64afd361e00796da8c1adddc105c82748f811a8f' 
  AND token = 'EnBiWQyHlpT3VSmXqfr0hBW5bKetGS9M66vBFFoRG8U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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