Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '26ab4f79a288aa6754673aa50995df34cc0f67e4824dc744835e4287a1c5e7bf' 
  AND token = 'n1XdsMXT764f3TLitD2LKqo/upaFtxO6LqqpSLVFwPU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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