SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '193de7bc52717b6606a4ee555a2a01cdb2f3c5394bb023c47f734688fe54e229' 
  AND token = 'O5p63OhVuG/KHcylsZNCYFeGGnaGj8CFnZbG83ezRNk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00059

JSON explain

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