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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ec02f78facae3ac8c1ddd7f74d213f1a8af05558f0cf058d26e11d773f24210c' 
  AND token = 'px6CQQA8ReuXlaFvjLMe3LVjfg/dPMtaSos9rWp6JrE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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