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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bcdd1f5e1b4388f85a0c3d176a34832af2922546a236d35d0baab82454f61e5e' 
  AND token = 'Kr7QWqEK3faN46WNI7K+pOXT9s9kDEJI+waT+ulkT20=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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