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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '89e6dc10fcb8e401155a1eb65ba12fb3f307793d16ee4a4eb3047d5fa8165dd2' 
  AND token = 'Ib6OeaFDuVvCeAuDAxzLGNNv2uNdL4GBJSVYD3Ypf9M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00190

JSON explain

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