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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bee8350c75272c3afe5caa6bd6b73b759ae1c87859afdd110b4f75fb3f9a7e1b' 
  AND token = 'XGVtWpD8uMfVRRzhSw2J09nKXMIs107NFrFfSoW1oPw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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