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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6b0206b3b0c8fcfa964b0a747d12f6745d67a5c772d53a97be1e139fa58f2c62' 
  AND token = '20mEbeUyMeNPt5NoguHYqXKOpAXRUZDE7U9+HTMgTbI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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