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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '018d3582cfb35da56d89ead56fe8a7e111175c7b775cdb18bfe9ce4054f1cd4a' 
  AND token = 'nLhKFut5F7DVt5olSCg6MZepFT3Gp201+R7p7DpJ4VA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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