Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f76d27262efca1496fadc7e9787467af6e52d9f6f834007e8256e1f04ae0b25b' 
  AND token = '8m3vDGkn/EwKnj8iRwLvmfz9INQz3TS2lrsey4nTAkI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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