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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98e53cbbf5a43784f1847a99562f32c7bda13a939ae308480c963e1b2c5b07b0' 
  AND token = 'gKo6zGj/X1B48BS3kyrZcR0A+8/t4f0KOqxx1D1wIeI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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