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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4b9487de95bd5fce9b278178749e001bac117eb2acfdcd53eb0edbf20c0f5d8f' 
  AND token = 'irg9Ly+DMElTp7Ml3LW76E611/De9ieXsfu9DvwWCSM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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