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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2e2e11e7f804b610f777f585077eb665c93d4d839ca07b5a0f8ad6754a648954' 
  AND token = 'RREqea9wccPDZl3tY8Qxpls2SE7lqgRCsj+MK7x3Bmg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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