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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01f4e605c64e48464091560dc3efaeb305a217ed35c13eab44e44d76fa529ef7' 
  AND token = 'pFysotafPEdRP5FsTiHczoxs9GzZKd7Ly+Pw5gL44Y8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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