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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '074a9296207f5082a94e2311d94573b584bd9e563f79e41d118a6441f24b7934' 
  AND token = 'vYScVIBVT0A+xSymXWWMWR0Z/KKDZr9LVeJN/y8yHX0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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