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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'aa8d079cc1dffa28c6e5ecdecee1d839d4b30673e8c30de1373e8a742d6153a2' 
  AND token = 'w2Oub4FrYIGFxLZJ5fYOk+qSNz2X5Hw1m/SMcIFs86g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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