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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bb809a310aa532d806573ada3559ba249eb07f5de44348f494613d2374147841' 
  AND token = 'xrHG5Ao4I6UhoRJSY3EXNERYpEU8B5yaxwSP1f7b3po=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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