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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f68c2fc4159dc5ee39cf8b6d9131b8a0ab3703a807137c9d8fdf7542ccd67594' 
  AND token = 'uvfa341iUh0A65OeJfVgDWjgMqOBRA1dzg81oIqJfGI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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