Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ead136322fed5ad1a563c9437530e36d050f11b69a0b922ad4a1edf43bd1cf58' 
  AND token = 'NqAtqtC12UH3o1MT1D5jt8XikjOYurbcemfwtBrjyj8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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