Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b2630a1132a871247fbd46b943ed0f0edb39dac76bb04b0972e0a1d5a5cce1f6' 
  AND token = 'lEGm7SyO5JOQNuYzUeWDritHswvVi0XO1+gWi9qWcKY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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