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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2472a2a4a6808eb237e0f84b9c35b0c144c10ddd8ee4724b70cd06ba436cb66b' 
  AND token = '7A/BwLqoKHErRay0JGoGmLiqtVvIgIK/8otFVw01k8o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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