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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0cb6018b18dfbf7db42d2c480781cf2ae304f383d4e3e4a5afa402d6463e94d3' 
  AND token = '08Y0CMGEYuI2wIGw18sYA3hKXAFvga2Y/FI4ZBf2Ou4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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