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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4fb72cc88a5055736e780aa379d45fc429168be00618bce4c03f30f8de5c7b22' 
  AND token = 'MrE6EFZFD76TdpuOU592mKGj3GIPaPGD9o7Rrw5eOxA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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