Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '7d3bfc7ebac69bb6d513556e80d4412c219b87f928b3ccfdc79b1179acd99eb3' 
  AND token = 'dbWhN4NzwEk7pyLOr7LJatiF+JjpmomvFgGxkbu4Jr8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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