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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6354a72f7863af6298ee8ab7530cc4a88d6dc28ffbaa03e05052cb90e7ccb1e4' 
  AND token = 'Vf5o3dtIPqujffL2qHqy4tQhO5kbuqIx/OvohnPtXMo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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