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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fb7e48f5bdb312eaee27d79ba6eb05ddc60d6fcea646fb4c4223a9b975c3deae' 
  AND token = 'lzdVaV3ZA/6GxPaMfbnD0Jllqk4Gxd3ojEKBWf3atCk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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