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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '861154f27c62b64b9f426e39ac962c825ffcce94dfee167ee70f3205707d6aa5' 
  AND token = 'agVjC4B92dekVHWZJT4y4KTmY9bCmVYtb/YA0yZ1fNc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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