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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '99af6bfc6f50d889b17035cb1c8d4826423382da6aa9d25ef4ec331d30d1d11b' 
  AND token = 'X0kg+udcNFnG6U7nXCki1npHfnHGnzgrbq1gBakpfrc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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