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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa5dd58b29dbe9fb90dd1ed7a3097f8b57e42b2ddfe70976966f223f131499c5' 
  AND token = '5s54x9/TM1HUcI3sGhtU3uxaiHw3zOR4GI9FBmEeUbA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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